24Port 1G Stackable Managed 4 X 10G Sfp+ 6Kv Surge Protection On All Gigabit Ethernet Ports Physical Stacking Up To 9 Switches Support Redundant Power Supply Rps Ztp Zerotouch Provisioning Ethernet Ring Protection Switching Erps Ieee 802.1Ag For Connectivity Fault Management Itut Y.1731 For Delay Measurement Messages